Dallas City vs Aurora

Informations

Dallas City is a city in Hancock and Henderson counties in the U.S. state of Illinois. The population was 945 at the 2010 census, a decline from 1,055 in 2000. The Hancock County portion of Dallas City is part of the Fort Madison–Keokuk, IA–IL–MO Micropolitan Statistical Area, and the Henderson County portion of Dallas City is part of the Burlington, IA–IL Micropolitan Statistical Area.

Source: Wikipedia

Informations

An aurora (plural: auroras or aurorae), sometimes referred to as polar lights (aurora polaris), northern lights (aurora borealis), or southern lights (aurora australis), is a natural light display in the Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic). Auroras are the result of disturbances in the magnetosphere caused by solar wind. These disturbances are sometimes strong enough to alter the trajectories of charged particles in both solar wind and magnetospheric plasma. These particles, mainly electrons and protons, precipitate into the upper atmosphere (thermosphere/exosphere).

The resulting ionization and excitation of atmospheric constituents emit light of varying color and complexity. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceleration imparted to the precipitating particles. Precipitating protons generally produce optical emissions as incident hydrogen atoms after gaining electrons from the atmosphere. Proton auroras are usually observed at lower latitudes.

Source: Wikipedia